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Abstract
Esters represent an important class of aroma compounds. They often possess fruity odors and are widely used by the food and the fragrance industries. Many of these interesting compounds are alkyl esters of acetic, propionic and butyric acids. Most are obtained by chemical synthesis, for non “natural” molecules, or by extraction from natural sources, dependent to seasonal, climatic and geographical variations and often require a large amount of raw materials.
A biotechnological process, is an alternative solution for producing “natural” esters, minimizing constraints encountered in natural extraction, and offering similar costs to those of the chemical processes. Rapid optimization of solid/gas enzymatic catalysis to perform esterification reactions is described and its realization at the pre-industrial scale is presented.